Hi all, I'm working on control system toolbox. I've obtained a system which is in MIMO form with 2 inputs and 2 outputs. I'd like to decouple the system and design the controller. What are the techniques that are available to perform the same? Will the system become two SISO systems? Is there any relation between the two separate loops? If possible, can you please include matlab code performing the same on a MIMO system?

I am also working on the MIMO system. I have 5 inputs and 2 outputs and my system is also coupled. But in my case I can't decoupled it.
I am also looking for some help.
Hvae you any idea how to deal with these type of system ?

Regards,
Zeeshan

"Vignesh Labam" <kl.vignesh@gmail.com> wrote in message <jdrh8v$mg9$1@newscl01ah.mathworks.com>...
> Hi all, I'm working on control system toolbox. I've obtained a system which is in MIMO form with 2 inputs and 2 outputs. I'd like to decouple the system and design the controller. What are the techniques that are available to perform the same? Will the system become two SISO systems? Is there any relation between the two separate loops? If possible, can you please include matlab code performing the same on a MIMO system?

On 1/2/2012 4:07 AM, Zeeshan Shareef wrote:
> Hi Vignesh !
> I am also working on the MIMO system. I have 5 inputs and 2 outputs and
> my system is also coupled. But in my case I can't decoupled it.
> I am also looking for some help.
> Hvae you any idea how to deal with these type of system
> Regards, Zeeshan
>
> "Vignesh Labam" <kl.vignesh@gmail.com> wrote in message
> <jdrh8v$mg9$1@newscl01ah.mathworks.com>...
>> Hi all, I'm working on control system toolbox. I've obtained a system
>> which is in MIMO form with 2 inputs and 2 outputs. I'd like to
>> decouple the system and design the controller. What are the techniques
>> that are available to perform the same? Will the system become two
>> SISO systems? Is there any relation between the two separate loops? If
>> possible, can you please include matlab code performing the same on a
>> MIMO system?

There is a ton of material written on the subject over the last 30 years.
Search google with:
"MIMO 2 input control design filetype:pdf", or
"MIMO decoupling filetype:pdf"
You'll learn more if you do your own homework.

Anony Mous <Anony.Mous451@yahoo.com> wrote in message <4f01e5ae$0$7085$9a6e19ea@unlimited.newshosting.com>...
> On 1/2/2012 4:07 AM, Zeeshan Shareef wrote:
> > Hi Vignesh !
> > I am also working on the MIMO system. I have 5 inputs and 2 outputs and
> > my system is also coupled. But in my case I can't decoupled it.
> > I am also looking for some help.
> > Hvae you any idea how to deal with these type of system
> > Regards, Zeeshan
> >
> > "Vignesh Labam" <kl.vignesh@gmail.com> wrote in message
> > <jdrh8v$mg9$1@newscl01ah.mathworks.com>...
> >> Hi all, I'm working on control system toolbox. I've obtained a system
> >> which is in MIMO form with 2 inputs and 2 outputs. I'd like to
> >> decouple the system and design the controller. What are the techniques
> >> that are available to perform the same? Will the system become two
> >> SISO systems? Is there any relation between the two separate loops? If
> >> possible, can you please include matlab code performing the same on a
> >> MIMO system?
>
> There is a ton of material written on the subject over the last 30 years.
> Search google with:
> "MIMO 2 input control design filetype:pdf", or
> "MIMO decoupling filetype:pdf"
> You'll learn more if you do your own homework.
>
> Ref: Decoupling Controller for a Distillation Column
> http://www.mathworks.com/products/robust/demos.html?file=/products/demos/shipping/robust/distill_demo.html
Thanks for the reply.

I am having quite the same problem but since my MIMO system is quite big, I need something more specific: do you know any forum where to ask some questions about decoupling control?
Thanks a lot

Anony Mous <Anony.Mous451@yahoo.com> wrote in message <4f01e5ae$0$7085$9a6e19ea@unlimited.newshosting.com>...
> On 1/2/2012 4:07 AM, Zeeshan Shareef wrote:
> > Hi Vignesh !
> > I am also working on the MIMO system. I have 5 inputs and 2 outputs and
> > my system is also coupled. But in my case I can't decoupled it.
> > I am also looking for some help.
> > Hvae you any idea how to deal with these type of system
> > Regards, Zeeshan
> >
> > "Vignesh Labam" <kl.vignesh@gmail.com> wrote in message
> > <jdrh8v$mg9$1@newscl01ah.mathworks.com>...
> >> Hi all, I'm working on control system toolbox. I've obtained a system
> >> which is in MIMO form with 2 inputs and 2 outputs. I'd like to
> >> decouple the system and design the controller. What are the techniques
> >> that are available to perform the same? Will the system become two
> >> SISO systems? Is there any relation between the two separate loops? If
> >> possible, can you please include matlab code performing the same on a
> >> MIMO system?
>
> There is a ton of material written on the subject over the last 30 years.
> Search google with:
> "MIMO 2 input control design filetype:pdf", or
> "MIMO decoupling filetype:pdf"
> You'll learn more if you do your own homework.
>
> Ref: Decoupling Controller for a Distillation Column
> http://www.mathworks.com/products/robust/demos.html?file=/products/demos/shipping/robust/distill_demo.html

Francesco:
For linear time-invariant systems there is a geometric framework developed by M. Wonham & S. Morse (US) and G. Basile & G. Marro (IT). B.Moore and A. Laub published some work on numerical implementation.

An algebraic approach was developed by P. Falb, E. Gillbert and others.

Some applications to aircraft control are reported by Cliff & Lutze.

Best wishes in your work

gene

"Francesco " <fraboi87@hotmail.com> wrote in message <ll21q9$f4a$1@newscl01ah.mathworks.com>...
> I am having quite the same problem but since my MIMO system is quite big, I need something more specific: do you know any forum where to ask some questions about decoupling control?
> Thanks a lot
>
>
>
>
> Anony Mous <Anony.Mous451@yahoo.com> wrote in message <4f01e5ae$0$7085$9a6e19ea@unlimited.newshosting.com>...
> > On 1/2/2012 4:07 AM, Zeeshan Shareef wrote:
> > > Hi Vignesh !
> > > I am also working on the MIMO system. I have 5 inputs and 2 outputs and
> > > my system is also coupled. But in my case I can't decoupled it.
> > > I am also looking for some help.
> > > Hvae you any idea how to deal with these type of system
> > > Regards, Zeeshan
> > >
> > > "Vignesh Labam" <kl.vignesh@gmail.com> wrote in message
> > > <jdrh8v$mg9$1@newscl01ah.mathworks.com>...
> > >> Hi all, I'm working on control system toolbox. I've obtained a system
> > >> which is in MIMO form with 2 inputs and 2 outputs. I'd like to
> > >> decouple the system and design the controller. What are the techniques
> > >> that are available to perform the same? Will the system become two
> > >> SISO systems? Is there any relation between the two separate loops? If
> > >> possible, can you please include matlab code performing the same on a
> > >> MIMO system?
> >
> > There is a ton of material written on the subject over the last 30 years.
> > Search google with:
> > "MIMO 2 input control design filetype:pdf", or
> > "MIMO decoupling filetype:pdf"
> > You'll learn more if you do your own homework.
> >
> > Ref: Decoupling Controller for a Distillation Column
> > http://www.mathworks.com/products/robust/demos.html?file=/products/demos/shipping/robust/distill_demo.html

"Gene " <ecliff@vt.edu> wrote in message <ll2ahl$5pu$1@newscl01ah.mathworks.com>...
> Francesco:
> For linear time-invariant systems there is a geometric framework developed by M. Wonham & S. Morse (US) and G. Basile & G. Marro (IT). B.Moore and A. Laub published some work on numerical implementation.
>
> An algebraic approach was developed by P. Falb, E. Gillbert and others.
>
> Some applications to aircraft control are reported by Cliff & Lutze.
>
> Best wishes in your work
>
> gene
>
> "Francesco " <fraboi87@hotmail.com> wrote in message <ll21q9$f4a$1@newscl01ah.mathworks.com>...
> > I am having quite the same problem but since my MIMO system is quite big, I need something more specific: do you know any forum where to ask some questions about decoupling control?
> > Thanks a lot
> >
> >
> >
> >
> > Anony Mous <Anony.Mous451@yahoo.com> wrote in message <4f01e5ae$0$7085$9a6e19ea@unlimited.newshosting.com>...
> > > On 1/2/2012 4:07 AM, Zeeshan Shareef wrote:
> > > > Hi Vignesh !
> > > > I am also working on the MIMO system. I have 5 inputs and 2 outputs and
> > > > my system is also coupled. But in my case I can't decoupled it.
> > > > I am also looking for some help.
> > > > Hvae you any idea how to deal with these type of system
> > > > Regards, Zeeshan
> > > >
> > > > "Vignesh Labam" <kl.vignesh@gmail.com> wrote in message
> > > > <jdrh8v$mg9$1@newscl01ah.mathworks.com>...
> > > >> Hi all, I'm working on control system toolbox. I've obtained a system
> > > >> which is in MIMO form with 2 inputs and 2 outputs. I'd like to
> > > >> decouple the system and design the controller. What are the techniques
> > > >> that are available to perform the same? Will the system become two
> > > >> SISO systems? Is there any relation between the two separate loops? If
> > > >> possible, can you please include matlab code performing the same on a
> > > >> MIMO system?
> > >
> > > There is a ton of material written on the subject over the last 30 years.
> > > Search google with:
> > > "MIMO 2 input control design filetype:pdf", or
> > > "MIMO decoupling filetype:pdf"
> > > You'll learn more if you do your own homework.
> > >
> > > Ref: Decoupling Controller for a Distillation Column
> > > http://www.mathworks.com/products/robust/demos.html?file=/products/demos/shipping/robust/distill_demo.html

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